/
rpcserver.py
executable file
·88 lines (65 loc) · 2.26 KB
/
rpcserver.py
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#!/usr/bin/env python
import signal
import sys
import time
import oslo_messaging as messaging
import structlog
from oslo_config import cfg
from stepic_plugins import settings
from stepic_plugins import rpc
logger = structlog.get_logger()
def init():
messaging.set_transport_defaults(control_exchange='stepic.rpc')
cfg.CONF.executor_thread_pool_size = 1
cfg.CONF.rpc_acks_late = True
def register_shutdown_handler(handler):
"""Register a handler that will be called on process termination."""
original_handlers = {}
def _signal_handler(signum, frame):
# Revert signal handlers to originals
for sig in [signal.SIGTERM, signal.SIGINT]:
signal.signal(sig, original_handlers[sig])
logger.info("Signal handler called with signal", signum=signum)
handler()
sys.exit(0)
for sig in [signal.SIGTERM, signal.SIGINT]:
original_handlers[sig] = signal.getsignal(sig)
signal.signal(sig, _signal_handler)
def stop_server(rpc_server):
"""Attempt to stop the RPC server gracefully."""
logger.info("Stopping RPC server...")
try:
rpc_server.stop()
rpc_server.wait()
except Exception:
pass
def init_timeout_killer():
if settings.USE_RPC_TIMEOUT_KILLER:
timeout_killer = rpc.TimeoutKillerThread(settings.RPC_DEFAULT_TIMEOUT)
timeout_killer.start()
return timeout_killer
def stop_timeout_killer(timeout_killer):
if timeout_killer:
logger.info("Stopping RPC timeout killer...")
timeout_killer.stop()
def main():
init()
timeout_killer = init_timeout_killer()
rpc_server = rpc.get_server(settings.RPC_TRANSPORT_URL,
timeout_killer=timeout_killer)
cfg.CONF.oslo_messaging_rabbit.rabbit_qos_prefetch_count = 1
def shutdown_handler():
stop_timeout_killer(timeout_killer)
stop_server(rpc_server)
register_shutdown_handler(shutdown_handler)
logger.info("Starting stepic-plugins RPC server...")
try:
rpc_server.start()
logger.info("RPC server started")
while True:
time.sleep(5)
except KeyboardInterrupt:
logger.warning("RPC server stopped ungracefully")
sys.exit(1)
if __name__ == '__main__':
main()